245 lines
6.8 KiB
C
245 lines
6.8 KiB
C
/*
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* Copyright (C) 2012 - Virtual Open Systems and Columbia University
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* Author: Christoffer Dall <c.dall@virtualopensystems.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License, version 2, as
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* published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*/
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#ifndef __ARM_KVM_HOST_H__
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#define __ARM_KVM_HOST_H__
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#include <linux/types.h>
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#include <linux/kvm_types.h>
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#include <asm/kvm.h>
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#include <asm/kvm_asm.h>
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#include <asm/kvm_mmio.h>
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#include <asm/fpstate.h>
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#include <kvm/arm_arch_timer.h>
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#if defined(CONFIG_KVM_ARM_MAX_VCPUS)
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#define KVM_MAX_VCPUS CONFIG_KVM_ARM_MAX_VCPUS
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#else
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#define KVM_MAX_VCPUS 0
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#endif
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#define KVM_USER_MEM_SLOTS 32
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#define KVM_PRIVATE_MEM_SLOTS 4
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#define KVM_COALESCED_MMIO_PAGE_OFFSET 1
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#define KVM_HAVE_ONE_REG
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#define KVM_VCPU_MAX_FEATURES 2
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#include <kvm/arm_vgic.h>
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u32 *kvm_vcpu_reg(struct kvm_vcpu *vcpu, u8 reg_num, u32 mode);
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int __attribute_const__ kvm_target_cpu(void);
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int kvm_reset_vcpu(struct kvm_vcpu *vcpu);
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void kvm_reset_coprocs(struct kvm_vcpu *vcpu);
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struct kvm_arch {
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/* VTTBR value associated with below pgd and vmid */
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u64 vttbr;
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/* Timer */
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struct arch_timer_kvm timer;
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/*
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* Anything that is not used directly from assembly code goes
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* here.
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*/
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/* The VMID generation used for the virt. memory system */
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u64 vmid_gen;
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u32 vmid;
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/* Stage-2 page table */
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pgd_t *pgd;
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/* Interrupt controller */
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struct vgic_dist vgic;
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};
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#define KVM_NR_MEM_OBJS 40
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/*
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* We don't want allocation failures within the mmu code, so we preallocate
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* enough memory for a single page fault in a cache.
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*/
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struct kvm_mmu_memory_cache {
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int nobjs;
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void *objects[KVM_NR_MEM_OBJS];
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};
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struct kvm_vcpu_fault_info {
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u32 hsr; /* Hyp Syndrome Register */
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u32 hxfar; /* Hyp Data/Inst. Fault Address Register */
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u32 hpfar; /* Hyp IPA Fault Address Register */
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u32 hyp_pc; /* PC when exception was taken from Hyp mode */
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};
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typedef struct vfp_hard_struct kvm_cpu_context_t;
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struct kvm_vcpu_arch {
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struct kvm_regs regs;
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int target; /* Processor target */
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DECLARE_BITMAP(features, KVM_VCPU_MAX_FEATURES);
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/* System control coprocessor (cp15) */
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u32 cp15[NR_CP15_REGS];
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/* The CPU type we expose to the VM */
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u32 midr;
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/* HYP trapping configuration */
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u32 hcr;
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/* Interrupt related fields */
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u32 irq_lines; /* IRQ and FIQ levels */
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/* Exception Information */
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struct kvm_vcpu_fault_info fault;
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/* Floating point registers (VFP and Advanced SIMD/NEON) */
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struct vfp_hard_struct vfp_guest;
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/* Host FP context */
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kvm_cpu_context_t *host_cpu_context;
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/* VGIC state */
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struct vgic_cpu vgic_cpu;
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struct arch_timer_cpu timer_cpu;
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/*
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* Anything that is not used directly from assembly code goes
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* here.
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*/
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/* dcache set/way operation pending */
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int last_pcpu;
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cpumask_t require_dcache_flush;
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/* Don't run the guest on this vcpu */
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bool pause;
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/* IO related fields */
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struct kvm_decode mmio_decode;
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/* Cache some mmu pages needed inside spinlock regions */
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struct kvm_mmu_memory_cache mmu_page_cache;
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/* Detect first run of a vcpu */
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bool has_run_once;
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};
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struct kvm_vm_stat {
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u32 remote_tlb_flush;
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};
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struct kvm_vcpu_stat {
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u32 halt_wakeup;
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};
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int kvm_vcpu_set_target(struct kvm_vcpu *vcpu,
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const struct kvm_vcpu_init *init);
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int kvm_vcpu_preferred_target(struct kvm_vcpu_init *init);
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unsigned long kvm_arm_num_regs(struct kvm_vcpu *vcpu);
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int kvm_arm_copy_reg_indices(struct kvm_vcpu *vcpu, u64 __user *indices);
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int kvm_arm_get_reg(struct kvm_vcpu *vcpu, const struct kvm_one_reg *reg);
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int kvm_arm_set_reg(struct kvm_vcpu *vcpu, const struct kvm_one_reg *reg);
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u64 kvm_call_hyp(void *hypfn, ...);
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void force_vm_exit(const cpumask_t *mask);
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#define KVM_ARCH_WANT_MMU_NOTIFIER
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int kvm_unmap_hva(struct kvm *kvm, unsigned long hva);
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int kvm_unmap_hva_range(struct kvm *kvm,
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unsigned long start, unsigned long end);
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void kvm_set_spte_hva(struct kvm *kvm, unsigned long hva, pte_t pte);
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unsigned long kvm_arm_num_regs(struct kvm_vcpu *vcpu);
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int kvm_arm_copy_reg_indices(struct kvm_vcpu *vcpu, u64 __user *indices);
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/* We do not have shadow page tables, hence the empty hooks */
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static inline int kvm_age_hva(struct kvm *kvm, unsigned long start,
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unsigned long end)
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{
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return 0;
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}
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static inline int kvm_test_age_hva(struct kvm *kvm, unsigned long hva)
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{
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return 0;
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}
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static inline void kvm_arch_mmu_notifier_invalidate_page(struct kvm *kvm,
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unsigned long address)
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{
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}
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struct kvm_vcpu *kvm_arm_get_running_vcpu(void);
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struct kvm_vcpu __percpu **kvm_get_running_vcpus(void);
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int kvm_arm_copy_coproc_indices(struct kvm_vcpu *vcpu, u64 __user *uindices);
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unsigned long kvm_arm_num_coproc_regs(struct kvm_vcpu *vcpu);
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int kvm_arm_coproc_get_reg(struct kvm_vcpu *vcpu, const struct kvm_one_reg *);
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int kvm_arm_coproc_set_reg(struct kvm_vcpu *vcpu, const struct kvm_one_reg *);
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int handle_exit(struct kvm_vcpu *vcpu, struct kvm_run *run,
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int exception_index);
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static inline void __cpu_init_hyp_mode(phys_addr_t boot_pgd_ptr,
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phys_addr_t pgd_ptr,
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unsigned long hyp_stack_ptr,
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unsigned long vector_ptr)
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{
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/*
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* Call initialization code, and switch to the full blown HYP
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* code. The init code doesn't need to preserve these
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* registers as r0-r3 are already callee saved according to
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* the AAPCS.
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* Note that we slightly misuse the prototype by casing the
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* stack pointer to a void *.
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*
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* We don't have enough registers to perform the full init in
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* one go. Install the boot PGD first, and then install the
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* runtime PGD, stack pointer and vectors. The PGDs are always
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* passed as the third argument, in order to be passed into
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* r2-r3 to the init code (yes, this is compliant with the
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* PCS!).
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*/
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kvm_call_hyp(NULL, 0, boot_pgd_ptr);
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kvm_call_hyp((void*)hyp_stack_ptr, vector_ptr, pgd_ptr);
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}
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static inline int kvm_arch_dev_ioctl_check_extension(long ext)
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{
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return 0;
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}
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static inline void vgic_arch_setup(const struct vgic_params *vgic)
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{
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BUG_ON(vgic->type != VGIC_V2);
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}
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int kvm_perf_init(void);
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int kvm_perf_teardown(void);
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static inline void kvm_arch_hardware_disable(void) {}
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static inline void kvm_arch_hardware_unsetup(void) {}
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static inline void kvm_arch_sync_events(struct kvm *kvm) {}
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static inline void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu) {}
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static inline void kvm_arch_sched_in(struct kvm_vcpu *vcpu, int cpu) {}
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#endif /* __ARM_KVM_HOST_H__ */
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